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CVE-2026-20912

Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure

Published: Jan 22, 2026Updated: Jan 29, 2026 Sources: CVE List NVD GHSACWE-284
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.4%
Top 71.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-284CWE-639

Affected Products

Gitea Open Source Git ServerGitea
On-prem
DevTools & CI / source-control
github.com/go-gitea/giteaGoOSS Libraries
giteagitea
On-premDev Tool
DevTools & CI / source-control
giteaoss-projectDevTools & CIaka gitea open source git server, gitea
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://github.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw
github.com
https://github.com/go-gitea/gitea/pull/36320
github.com
https://github.com/go-gitea/gitea/pull/36355
github.com
and 6 more references View all →

Timeline

Published
Jan 22, 2026
Last Updated
Jan 29, 2026

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